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|
--
-- num_nulls()
--
SELECT num_nonnulls(NULL);
num_nonnulls
--------------
0
(1 row)
SELECT num_nonnulls('1');
num_nonnulls
--------------
1
(1 row)
SELECT num_nonnulls(NULL::text);
num_nonnulls
--------------
0
(1 row)
SELECT num_nonnulls(NULL::text, NULL::int);
num_nonnulls
--------------
0
(1 row)
SELECT num_nonnulls(1, 2, NULL::text, NULL::point, '', int8 '9', 1.0 / NULL);
num_nonnulls
--------------
4
(1 row)
SELECT num_nonnulls(VARIADIC '{1,2,NULL,3}'::int[]);
num_nonnulls
--------------
3
(1 row)
SELECT num_nonnulls(VARIADIC '{"1","2","3","4"}'::text[]);
num_nonnulls
--------------
4
(1 row)
SELECT num_nonnulls(VARIADIC ARRAY(SELECT CASE WHEN i <> 40 THEN i END FROM generate_series(1, 100) i));
num_nonnulls
--------------
99
(1 row)
SELECT num_nulls(NULL);
num_nulls
-----------
1
(1 row)
SELECT num_nulls('1');
num_nulls
-----------
0
(1 row)
SELECT num_nulls(NULL::text);
num_nulls
-----------
1
(1 row)
SELECT num_nulls(NULL::text, NULL::int);
num_nulls
-----------
2
(1 row)
SELECT num_nulls(1, 2, NULL::text, NULL::point, '', int8 '9', 1.0 / NULL);
num_nulls
-----------
3
(1 row)
SELECT num_nulls(VARIADIC '{1,2,NULL,3}'::int[]);
num_nulls
-----------
1
(1 row)
SELECT num_nulls(VARIADIC '{"1","2","3","4"}'::text[]);
num_nulls
-----------
0
(1 row)
SELECT num_nulls(VARIADIC ARRAY(SELECT CASE WHEN i <> 40 THEN i END FROM generate_series(1, 100) i));
num_nulls
-----------
1
(1 row)
-- special cases
SELECT num_nonnulls(VARIADIC NULL::text[]);
num_nonnulls
--------------
(1 row)
SELECT num_nonnulls(VARIADIC '{}'::int[]);
num_nonnulls
--------------
0
(1 row)
SELECT num_nulls(VARIADIC NULL::text[]);
num_nulls
-----------
(1 row)
SELECT num_nulls(VARIADIC '{}'::int[]);
num_nulls
-----------
0
(1 row)
-- should fail, one or more arguments is required
SELECT num_nonnulls();
ERROR: function num_nonnulls() does not exist
LINE 1: SELECT num_nonnulls();
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
SELECT num_nulls();
ERROR: function num_nulls() does not exist
LINE 1: SELECT num_nulls();
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
--
-- Test some built-in SRFs
--
-- The outputs of these are variable, so we can't just print their results
-- directly, but we can at least verify that the code doesn't fail.
--
select setting as segsize
from pg_settings where name = 'wal_segment_size'
\gset
select count(*) > 0 as ok from pg_ls_waldir();
ok
----
t
(1 row)
-- Test ProjectSet as well as FunctionScan
select count(*) > 0 as ok from (select pg_ls_waldir()) ss;
ok
----
t
(1 row)
-- Test not-run-to-completion cases.
select * from pg_ls_waldir() limit 0;
name | size | modification
------+------+--------------
(0 rows)
select count(*) > 0 as ok from (select * from pg_ls_waldir() limit 1) ss;
ok
----
t
(1 row)
select (w).size = :segsize as ok
from (select pg_ls_waldir() w) ss where length((w).name) = 24 limit 1;
ok
----
t
(1 row)
select * from (select pg_ls_dir('.') a) a where a = 'base' limit 1;
a
------
base
(1 row)
select * from (select (pg_timezone_names()).name) ptn where name='UTC' limit 1;
name
------
UTC
(1 row)
select count(*) > 0 from
(select pg_tablespace_databases(oid) as pts from pg_tablespace
where spcname = 'pg_default') pts
join pg_database db on pts.pts = db.oid;
?column?
----------
t
(1 row)
|
